EP 0577761 A4 19940713 - MIXED CHROMIUM CATALYSTS AND POLYMERIZATIONS UTILIZING SAME
Title (en)
MIXED CHROMIUM CATALYSTS AND POLYMERIZATIONS UTILIZING SAME
Publication
Application
Priority
US 67537891 A 19910326
Abstract (en)
[origin: WO9217511A1] Mixed catalyst compositions comprised of a first supported chromium-containing catalyst component and a second supported chromium-containing catalyst component and which additionally have one or more metallic or non-metallic catalytic agents associated therewith are provided. The additional metallic or non-metallic elements associated with the catalyst components can be aluminium, titanium, zirconium, boron, phosphorous or combinations thereof. The pore volume of the silica supports used for the first and second catalyst components differs by at least 0.3 cc/g. The mixed catalyst compositions of the invention are useful for the preparation of polyolefins. They are particularly useful of polymerization of ethylene in particle form polymerizations to produce high density polyethylene blow molding resins having good processability and physical properties. The improved particle form polymerizations process and products obtained thereby using the above-described mixed catalyst compositions are also described.
IPC 1-7
IPC 8 full level
C08F 4/06 (2006.01); C08F 4/24 (2006.01); C08F 4/648 (2006.01); C08F 10/00 (2006.01); C08F 110/02 (2006.01)
CPC (source: EP US)
C08F 10/00 (2013.01 - EP US); C08F 110/02 (2013.01 - EP US); C08F 2410/04 (2013.01 - EP US)
Citation (search report)
- No further relevant documents disclosed
- See references of WO 9217511A1
Designated contracting state (EPC)
DE ES FR GB IT NL SE
DOCDB simple family (publication)
WO 9217511 A1 19921015; CA 2106565 A1 19920927; EP 0577761 A1 19940112; EP 0577761 A4 19940713; FI 934195 A0 19930924; FI 934195 A 19930924; JP H06506259 A 19940714; NO 933411 D0 19930924; NO 933411 L 19931111; US 5198400 A 19930330
DOCDB simple family (application)
US 9202337 W 19920318; CA 2106565 A 19920318; EP 92910798 A 19920318; FI 934195 A 19930924; JP 50997892 A 19920318; NO 933411 A 19930924; US 67537891 A 19910326